If a−b=7 and ab=18 , then a3−b3=
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54699iouroteirr of uyiituusjk
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- (7)3 = a3+b3+3*18(7)
- 7*7*7= a3 + b3 + 3*18*7
- 343= a3-b3 +378
- a3- b3 = 378+343
- answer = 721
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